This knife has serial #03088. It is a folding knife with a 3" locking blade and stage grips. The blade reads "Schrade 1787 Wostenholm Sheffield England I-XL" Not quite in that order but that is all the information the blade. One end of the handle is stamped with some marks "SW(some symbol almost like a person's head)0". Can anyone help me identify what I have here and what it may be worth? Thanks.